Thread cutter for shuttles



Oct. 11, 1932. I o, v, PAYNE 1,881,921

THREAD CUTTER FOR SHUTTLES Filed Feb. 21, 1951 Jv l/EN TOR L75 CAP? [/54YNE Patented Oct. 11, 1932 UNITE stares P TENTQoPFiE-f OSCAR v, PAYNE,or woncnsrnn, MASSACHUSETTS, ASSIGNOR To o'noMrroN c; KNOWLES LOOMworms, or woncnsrna, MASSACHUSETTS, aconronarioiv or MASSACHUSETTSannual) our'rrinron SHUTTLES I Application filed February 21, 1931.;Serial 1 11;. 517,562 g This invention relatesto improvements inweft-cutters for'automatic looms and it is the general object of theinvention to utilize concave and convex coacting members to assist inparting the weft leading from the shuttle delivery eye.

'In'weft replenishing looms there remains at the time of transfer athread end which extends from the outgoing bobbin through the deliveryeye and along the front wallof the shuttle to the adjacent selvage. Itisdesirable to remove this end prior to the succeeding pick of theshuttle in order to prevent the same from beingwhipped'into the shed.Severing the Weft is a part of theoperation necessary to accomplish thisresult. It is an important object of my present invention to provide ashuttle with a delivery eye so formed that it will coact with a normallyinoperative device at the time of transfer to force the weft issuingfromthe eye against a portion of the device to part the weft.

It is a further object of my present invention to provide a resilientlymounted weft parting device whichshall have a rounded rear end movableinto engaging relation with those portions of the delivery eye overwhich the weft normally extends when the shuttle is boxedfor transfer.The rounded end'is preferably spherical, but whatever its form, it is soshaped as to conform to a portion at least of the delivery eye. Meansare also provided to permit the rounded or spherical surface to moveboth vertically and horizontally throughout a restricted zone of motionfor the purpose of coacting with the shuttle even though the latter beslightly misplaced.

With these and other objects in view which will'appear as thedescription proceeds, my inventionresides in the combination andarrangement of parts hereinafter described and set forth in the claims;

In the accompanying drawing, wherein a convenient embodiment of myinvention is set forth,

Fig. 1 is a top plan view of a shuttle and weft parter made according tomy present invention, parts of the shuttle being shown in section,

Fig. 2 is an enlarged horlzontal section through the member which is independentof the shuttle and normally placed out of en'- gaging positionwith the latter, and

Fig. 31s a front elevation of the shuttle.

Referring to the drawing, I have shown a" shuttle S having aweftcham-ber in which the weft carrier 11'is normally mounted. The weftW extends from the carrier into a thread passage '12 and may be ledaround a guide post 13 toward adelivery eye 14. The latter may be formedsubstantially as shown in Figs. 1 and 3 and'may have atubular body 15with a thread opening 16 at the top thereof as shown in Fig. 3.. The eyeis made of hard material, preferably metal, and has a tubular bore withwhich, as indicated at 17 in Fig 1, may be formed to assist inparting'th'e weft. The.

surfacel'? maybe either acutting edge or aslightly rounded surface.

A lever 20may be mounted tomove about a surfaces or edges the head andthe'tube'may be used to give a finer setting. A hammerhead 28 has a,

rounded preferably spherical rear end 29 which is proportioned to coactwith the sur-' face 17 of the'delivery eye. 'The forward end of the headmay have a flange 30 which en gages the end wall 31 of the tube 26 tolimit rearward movement of thehammer. A com-' pression spring 32 islocated between the thread head 25 and the fl'angeBO and tends normallyto hold the hammer head in rear position but permits the latter toassumethe dotted line positions shown in Fig. 2.

In operation, the transferrer arm'22 holds the lever and hammer head28in forward position against the action of spring 23 so that as theshuttle moves forwardly on the lay L the delivery eye will not engagethe spherical end 29 of the hammer. At the time of transfer, however,

the arm 22 moves forwardly to permit spring 231:0 move the hammer headrearwardly and the rounded end 29 of the latter-will thereupon bebrought into the path of movement of the delivery eye. Further advance"movement of the lay will i effect engagement between the edge 17 andthe. surface 29 with resultant parting-of the weft. shuttlelthe weft endmove out of the eye and there will be no thread in the'shuttle eye.

While I have shown the edge 17 as'being circular and formed aspart ofthe sidede livery eye, yet in its broader significance my inventioncontemplatestheuse of a surface on the shuttle across which the weftextends I so shaped as tocoact with the. rounded ham- 7 mer for thepurpose of parting the weft when the hammer forces the weft against itscircular or. areuate surface. l 1

In, the ordinary running of a loom the shuttle will notalways be boxedin exactly the same position and in order that the part- J er mayoperatewith theshuttle when slightly .displaced'the yielding, mounting setforth herein 1S employed. As shownin full lines in Fig. 2the hammerheadis atrest with the V 1 spring 32 fully expanded. Should theshuttle'be'to the right or left of its normal position,;however, therounded surface of the head will cam the latter so that-it will assume Ione or the-,oth'er'of the dotted line positions shownin Fig. 2. In viewof the fact that the surface 29-is spherical .the movement from the fullto the dotted line positions will not affect materially the relationbetween the weft parting surfaces." i From the foregoingitwill be seenthat I have provided a simple form of thread parter wherein a roundedmember is broughtinto contact with a second member which is concavegandprovideduwithf asurface to coact with a rounded member, one of saidmembers being mounted on the shuttle and so disposed that theweft'extends thereacross when the shuttle isinreplenishingposition. Aconvenient embodimentof this principle contemplates the use of the sidedelivery eye as the concave member. It will furtherbe seen that themember which is mounted independently of. the shuttle is adapted foruniversal movement and-that the relation of the contacting surfaces ofthe members is not materially changed by slight displacements -of .theshuttle. It will also be seen that the spring 32 will permit yielding ofthe hammer head after the two weft parting members engage and duringsubsequent forward movement of the lay. Variations in the force exertedby the spring32 may be obtained by changing the relative position of thetube 26 and the head. 25.

Having thus described my invention it will be seen that changes andmodifications As the exhausted, bobbin leaves the.

thereof will be free to may be made therein by thoseskilled in the artwithout departing from the spirit and scope limited to what I claim is:

In weft parting mechanism for a weft replenshing' loom, a

shuttle having a weft delivery eye,,and means to coact with the eyetopart the r r V 2. In combination in a weft replenishing loom, ashuttle having a weftdeliveryj eye thejweft against the eye to partsaidweft.

wardly with the-lay and havinga front delivery eye and means operativethrough forward movement of'the lay to coact with the eye andpar-t theweft. i i 7 tIn combination in a weft replenishing i loom, a shuttlehaving a'w'eft-delivery eye from which weftextends and across apor= ofthe invention and Iido not wish to be; the details herein disclosed, but

1 formed of hardmaterial, and means to force 3, In oombinationin a weftreplenishing I. loom having a lay,,a shuttle movable for from whichv the,weft extends,

tion of which theweft lies, and means to en- 6. In weft partingmechanism fora weft r a pair of coactmg members one concave and a I oneof the members mount replenishing loom operating with a'shuttle',

the other convex, ed on the front wall of the shuttle, the weftextending across one of'said members, and means to cause engagement ofthe members to part the weft 7 In weft artin mechanism for a weftreplenishing loom operating with a shuttle, V i

a pair of coacting weft parting members one concave and mounted on theshuttle and the other convex and mounted independently of the shuttleand proportioned to enter theconcave member, the weft leading from theconcave member over a surface ofthe latter engaged by the convex member,and means to effect engagement between the members to partthe weft. 7

8,. In weftparting mechanism for a weft replenishing loom operating witha shuttle; a concave member carried by the front wall of the shuttle andhaving a portion over which the weft extends, a convex member toregisterwith the concave'member, and means toeffec-t engagementofthemembersto part the weft between them. I

'9. In weft parting mechanism for a weft replenishing loomoperating witha shuttle,

I a pair of weft parting members one of which is concave and mounted onthe shuttlegan'd the other of which 1soonca-ve,the concave member toapproach the convex member, a yielding mounting for the convex membereffective to yield in any angular direction relatively to the line ofapproach of the'members, the weft extending through and across a portionof the concave member, and means to effect engagement between themembers to part the wef f I 10. In weft parting mechanism fora weftreplenishing loom operating with a shuttle, a pair of weft partingmembers one of which is concave and located on the front wall of theshuttle, and the other of which is'convex and proportioned to registerwith a surface of the, concave member, the weft of the shuttle ex-'tending across one of said members, and means to effect engagementbetween the members to part the weft.

11. In weft parting mechanism for a weft replenishing loom operating.with the shut tle, a pair of coacting weft parting members one of whichis carried by the shuttle and has an arcuate surface across which theweft extends, the other member having a substantially spherical convexsurface to engage the arcuate surface of the other member to part theweft. V r

12. In weft parting mechanism for a weft replenishing loom operatingwith the shuttle movable forwardly in the loom, a weft parting membercarried by the shuttle, a second parting member to coact with the firstnamed member to effect parting of the weft, a holder for the secondmember, and a yielding positioning element 7 supported by the holder andcontacting with the second named element and yieldab-le in all angulardirections with respect to the forward movable shuttle.

second member being movable with respect to the holder when engaging theconcave member to accommod te different positions of the shuttle.

15. In weft. parting mechanism for a' weft replenishing loom operatingwith the shuttle, a concave'weft parting member carried by the shuttle,a second weft parting member having a convex'rounded surface to engagethe concave member to effect weft parting, the second member beingelongated in the direction of the advance of the shuttle, a holder forthe second memberwith respect to which the latter is movable in allangular directions, a resilient element to maintain the second member innormal position, said sec- 0nd member being movable'with respect to theholder when engaging the concave member to accommodate a differentposition of the shuttle, the resilient element consisting of acompression spring and the holder being tubular to guide the spring. 7

In testimony whereof fixed my signature. c 1 I g I OSCAR V. PAYNE;

I have hereunto af- 13. In weft parting mechanism for a weft having aconvex rounded surface to engage V the concave member to effect weftparting, a carrier for the second member, and aresilient connectioninterposed between the carrier and the second member whereby the latteris yieldab-le forwardly with respect to the carrier by a force derivedfrom the shuttle, and angularly in all directions relatively to the pathof movement of the member on the shuttle.

14. In weft parting mechanism for a weft replenishing loom operatingwith the shuttle, a concave weft parting member carried by the shuttle,a second weft parting member having a convex rounded surface, to engagethe concave member to eflect weft parting, the second member beingelongated in the direction of the advance of the shuttle, a holder forthe second member with respect to which the latter is movable in allangular directions, a resilient element to maintain the second member innormal position, said

